EP1512858B1 - Brennkraftmaschine mit Einrichtung zur Optimierung der Zylinderluftbefüllung - Google Patents

Brennkraftmaschine mit Einrichtung zur Optimierung der Zylinderluftbefüllung Download PDF

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Publication number
EP1512858B1
EP1512858B1 EP04300166A EP04300166A EP1512858B1 EP 1512858 B1 EP1512858 B1 EP 1512858B1 EP 04300166 A EP04300166 A EP 04300166A EP 04300166 A EP04300166 A EP 04300166A EP 1512858 B1 EP1512858 B1 EP 1512858B1
Authority
EP
European Patent Office
Prior art keywords
valve
opening
inlet
internal combustion
valves
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP04300166A
Other languages
English (en)
French (fr)
Other versions
EP1512858A1 (de
Inventor
Panagiotis Christou
Yvan Danet
Marta Marti-Moreno
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Renault SAS
Original Assignee
Renault SAS
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Filing date
Publication date
Application filed by Renault SAS filed Critical Renault SAS
Publication of EP1512858A1 publication Critical patent/EP1512858A1/de
Application granted granted Critical
Publication of EP1512858B1 publication Critical patent/EP1512858B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D13/00—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing
    • F02D13/02—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing during engine operation
    • F02D13/0257—Independent control of two or more intake or exhaust valves respectively, i.e. one of two intake valves remains closed or is opened partially while the other is fully opened
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B31/00—Modifying induction systems for imparting a rotation to the charge in the cylinder
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B31/00—Modifying induction systems for imparting a rotation to the charge in the cylinder
    • F02B31/08—Modifying induction systems for imparting a rotation to the charge in the cylinder having multiple air inlets
    • F02B31/085—Modifying induction systems for imparting a rotation to the charge in the cylinder having multiple air inlets having two inlet valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B2275/00—Other engines, components or details, not provided for in other groups of this subclass
    • F02B2275/14—Direct injection into combustion chamber
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B3/00—Engines characterised by air compression and subsequent fuel addition
    • F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

Definitions

  • the present invention relates to internal combustion engines, such as direct injection diesel engines or spark ignition engines, and, more particularly, it relates to such an engine comprising means for improving the combustion by optimization of the air-fuel mixture in the cylinders.
  • a well-known method is to generate in the cylinder a whirling air movement suitable for stirring the air introduced into the cylinder, for example to homogenize the thermodynamic characteristics and ensure the most suitable mixture possible with the fuel also injected in the cylinder.
  • This swirling air movement can, in general, be decomposed into a rotational movement substantially around the axis of the cylinder, this movement being conventionally called "swirl", and a rotational movement along an axis perpendicular to the axis of the cylinder, called "tumble".
  • the present invention is particularly aimed at improving the swirl, as a means likely to optimize combustion.
  • this swirl is particularly advantageous in operation of the low load engine, it is not necessarily the same at high load. Indeed, we know that the generation of swirl in the cylinder is at the expense of the permeability of the cylinder head, that is to say the ease of air to enter the cylinder through the admission ducts, and as a result the generation of swirl is penalizing for fresh air filling and therefore for performance.
  • the fuel is injected into the cylinders by an injector that is conventionally sought to position as centrally and coaxially with the cylinder as possible, and in front of the engine.
  • the mixture of air and fuel is achieved with the help of the swirl generated in the cylinder by a rotational movement of the air generated during the intake and amplified in the piston bowl during the compression.
  • the value of swirl is conventionally determined as being the ratio between the speed of rotation of the air and the speed of rotation of the engine, a swirl of 1 corresponding theoretically to the case where the air admitted makes a turn in the cylinder during a motor revolution, between the top dead spots of start of admission and end of compression.
  • a disadvantage of these swirl generation solutions is that they greatly reduce the permeability of the cylinder head and thus the fresh air filling of the cylinders and the engine performance, because of one by the air is braked by the curved shapes of the ducts. and, on the other hand, the movement of the air printed by one of the valves may upset the entry of the air by the neighboring valve.
  • the present invention aims to solve the above problems and aims in particular to provide a new means of generating a swirl movement while maintaining intake ducts providing maximum permeability of the cylinder head for the intake of air fresh.
  • the invention relates to an internal combustion engine with direct injection of fuel into the cylinders and each cylinder has at least two intake valves, the intake ducts opening at each valve of are straight ducts and the control laws of the intake valves are different, one second of the intake valves being controlled to open with a predetermined delay with respect to a first valve, and all the intake valves closing substantially at the same time.
  • straight duct here means, according to the meaning that the person skilled in the art classically gives to this designation, an intake duct corresponding to each valve, this duct being substantially straight in the cylinder head, the intake manifold to the relevant valve. This must be understood as opposed to the helical or tangential inlet ducts, previously mentioned for the generation of swirl, and which therefore have a greater or lesser curvature before opening into the combustion chamber.
  • straight ducts instead of helical and / or tangential ducts conventionally used for the generation of swirl, makes it possible to increase the permeability of the cylinder head at the inlet, and thus to ensure a filling of maximum fresh air. and therefore a maximum power deliverable by the engine.
  • the use of these straight ducts makes it possible to increase the permeability of the cylinder head by 50 to 80% depending on the bore of the engine, with respect to equivalent engines but including helical or tangential ducts.
  • the offset of the opening between the valves is preferably between 40 and 50 ° crankshaft rotation angle.
  • the opening law of the valve opening last is a small law, that is to say that not only the duration of opening but also the amplitude of this opening is reduced compared to that valve opening first.
  • the figure 1 schematically represents the intake ducts 11, 12 corresponding to the same cylinder 1, coming from a common inlet 13 in the cylinder head and opening respectively through intake valves 21, 22, the exhaust valves being marked 31 and 32 Note the rectilinearity of the ducts 11, 12 and their symmetry with respect to a plane P orthogonal to the direction of alignment of the cylinders.
  • the line A21 represents the lifting of the intake valve 21 and the line A22 represents the lifting of the valve 22.
  • the phase difference between Drawings A21 and A22 are of the order of 40 to 50 ° crankshaft angle for the opening of the valves, while their closure is substantially simultaneous. Note also the maximum lift of the second valve 22 which is significantly smaller than that of the valve 21 which opens first.
  • variable distribution engine that is to say whose valve opening control laws can be modified during operation, as known from the skilled person.
  • the use of the shift of the control law of a valve makes it possible to adapt the operation of the engine for a low load, whereas a high swirl is desired. , but to strongly reduce this swirl in heavy load by eliminating or reducing this shift, while taking advantage of the increased permeability of the cylinder head with straight ducts to limit the pressure drop in the intake ducts.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)
  • Characterised By The Charging Evacuation (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Spark Plugs (AREA)

Claims (5)

  1. Verbrennungsmotor mit Kraftstoff-Direkteinspritzung in die Zylinder (1) und variabler Ventilsteuerung, der mindestens zwei Einlassventile (21, 22) pro Zylinder (1) aufweist, deren Öffnungen versetzt sind und sich im Wesentlichen gleichzeitig schließen, und deren Steuergesetze (A21, A22) von dem Rotationswinkel der Kurbelwelle abhängen, und eine gerade Einlassleitung (11, 12), die auf dem Niveau jedes Einlassventils (21, 22) mündet,
    dadurch gekennzeichnet:
    - dass die Einlassleitungen (11, 12) symmetrisch zu einer Ebene P im rechten Winkel zur Fluchtungsrichtung der Zylinder (1) angeordnet sind, und
    - dass die Dauer und die Öffnung des Ventils (22), das sich zuletzt öffnet, im Vergleich zu denen des Ventils (21), das sich zuerst öffnet, verringert sind.
  2. Verbrennungsmotor nach Anspruch 1, dadurch gekennzeichnet, dass der Versatz der Öffnung zwischen den Einlassventilen (21, 22) zwischen 40 und 50° Kurbelwellenrotationswinkel liegt.
  3. Verbrennungsmotor nach Anspruch 1, dadurch gekennzeichnet, dass die Öffnungssteuergesetze (A21, A22) der Ventile (21, 22) im Laufe des Betriebs derart geändert werden können, dass der Versatz des Steuergesetzes eines Ventils verwendet wird, um den Betrieb des Motors an seine Belastung anzupassen.
  4. Verbrennungsmotor nach Anspruch 1, dadurch gekennzeichnet, dass er ein Motor mit variabler Ventilsteuerung ist.
  5. Verwaltungsverfahren des Betriebs eines Motors nach Anspruch 4, dadurch gekennzeichnet, dass man einen Versatz des Öffnungssteuergesetzes eines Einlassventils verwendet, um den Betrieb des Motors für eine geringe Last anzupassen, und bei starker Belastung diesen Versatz weglässt oder verringert.
EP04300166A 2003-03-27 2004-03-26 Brennkraftmaschine mit Einrichtung zur Optimierung der Zylinderluftbefüllung Expired - Lifetime EP1512858B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0303744A FR2853010B1 (fr) 2003-03-27 2003-03-27 Moteur a combustion interne comportant des moyens d'optimisation du remplissage en air des cylindres.
FR0303744 2003-03-27

Publications (2)

Publication Number Publication Date
EP1512858A1 EP1512858A1 (de) 2005-03-09
EP1512858B1 true EP1512858B1 (de) 2008-12-10

Family

ID=32947198

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04300166A Expired - Lifetime EP1512858B1 (de) 2003-03-27 2004-03-26 Brennkraftmaschine mit Einrichtung zur Optimierung der Zylinderluftbefüllung

Country Status (5)

Country Link
EP (1) EP1512858B1 (de)
AT (1) ATE417195T1 (de)
DE (1) DE602004018238D1 (de)
ES (1) ES2315629T3 (de)
FR (1) FR2853010B1 (de)

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4703734A (en) * 1985-03-06 1987-11-03 Nissan Motor Co., Ltd. Multi-valve internal combustion engine
US4759321A (en) * 1985-06-24 1988-07-26 Nissan Motor Co., Ltd. Valve timing arrangement for internal combustion engine having multiple inlet valves per cylinder
US5239960A (en) * 1991-07-30 1993-08-31 Mazda Motor Corporation Engine induction system provided with a mechanical supercharger
GB9222353D0 (en) * 1992-10-23 1992-12-09 Ricardo Consulting Eng Spark ignited internal combustion engines
JPH06272562A (ja) * 1993-03-18 1994-09-27 Mazda Motor Corp 直噴式２サイクルディーゼルエンジン
JPH09256891A (ja) * 1996-03-25 1997-09-30 Nippon Soken Inc ディーゼルエンジンの制御装置
JPH11229913A (ja) * 1998-02-12 1999-08-24 Toyota Motor Corp 内燃機関の動弁装置
GB2350400A (en) * 1999-05-22 2000-11-29 Ford Global Tech Inc I.C. engine with internal exhaust gas recirculation generated by variable valve timing
FR2803626B1 (fr) * 2000-01-10 2002-11-29 Magneti Marelli France Moteur a combustion interne a injection directe a soupapes commandees
JP2002242716A (ja) * 2001-02-21 2002-08-28 Hitachi Ltd 筒内噴射エンジンの制御装置

Also Published As

Publication number Publication date
FR2853010B1 (fr) 2008-01-25
ES2315629T3 (es) 2009-04-01
FR2853010A1 (fr) 2004-10-01
DE602004018238D1 (de) 2009-01-22
ATE417195T1 (de) 2008-12-15
EP1512858A1 (de) 2005-03-09

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